After reading this forum for a couple of months i have decided on either the RX-v2400 or the RX-v1400. Is buying the 2400 that much of an improvement over the 1400? What will i be gaining using one over the other. I will be using speakers of various manufacturers. JBL fronts BOSE (don't laugh) for the rear and center. And a Polk 450 series sub. Any help would be appreciated.